.online-main{
    width:900px;
    margin:auto!important;
}
.online-main > div{
    width:100%;
}
.online-main-top{

}
.online-main-bottom{

}
.online-main-top .online-main-top-sub{
    display: inline-block;
    width:12%;
    text-align: center;
    height:100%;
    background-repeat: no-repeat;
    background-size: 100% auto;
    position: relative;
}
.online-main-top .online-main-top-sub .online-main-top-sub-header{
    color: #c7d1ea;
    position: absolute;
    left: 0px;
    right: 0px;
    margin:0 auto;
    top: -10px;
}